S4 current meter observations from MLML particle traps from R/V Atlantis II cruise AII-119-5 in the North Atlantic in 1989 (U.S. JGOFS NABE project)

Website: https://www.bco-dmo.org/dataset/2579
Version: August 1, 1995
Version Date: 1995-08-01

Project
» U.S. JGOFS North Atlantic Bloom Experiment (NABE)

Program
» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
ContributorsAffiliationRole
Broenkow, WilliamMoss Landing Marine Laboratories (MLML)Principal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

S4 Current Meter Observations on MLML Particle Trap


Methods & Sampling

   PI:              William Broenkow
   of:              Moss Landing Marine Laboratory (MLML)
   dataset:         S4 Current Meter Observations on MLML Particle Trap   
   dates:           May 18, 1989 to June 07, 1989
   location:        N: 59.8117  S: 46.24  W: -20.7483  E: -17.68
   project/cruise:  North Atlantic Bloom Experiment/Atlantis II 119, leg 5
   ship:            R/V Atlantis II
 

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Data Files

File
current_meter.csv
(Comma Separated Values (.csv), 22.74 KB)
MD5:a65f5d4357eb14471d4969bca166406a
Primary data file for dataset ID 2579

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Parameters

ParameterDescriptionUnits
date

Date of S4 time series, as YYYYMMDD

time_dec

Time of day of S4 time series

GMT decimal hours
time_gmt

Time from Midnight 22 April 1989

GMT decimal hours
lat

North Latitude of Trap Mooring

decimal degrees
lon

West Longitude of Trap Mooring

decimal degrees
temp

Temperature

degrees C
press

Pressure

decibars
moor_vel_north

Mooring Velocity North (V) Component

cm/sec
moor_vel_east

Mooring Velocity East (U) Component

cm/sec
moor_speed

Mooring Speed

cm/sec
moor_dir

Mooring Direction

degrees Magnetic
curr_north

Relative Current North (V) Component, measured by S4 at 160 m

cm/sec
curr_east

Relative Current East (U) Component, measured by S4 at 160 m

cm/sec
curr_speed

Relative Current Speed, measured by S4 at 160 m

cm/sec
curr_dir

Relative Current Direction measured by S4 at 160 m

degrees Magnetic
curr_vel_north_abs

Absolute Velocity North (V) Component, sum S4 relative + mooring

cm/sec
curr_vel_east_abs

Absolute Velocity East (U) Component, sum S4 relative + mooring

cm/sec
curr_speed_abs

Absolute Current Speed, sum S4 relative + mooring

cm/sec
curr_dir_abs

Absolute Current Direction, sum S4 + mooring

degrees Magnetic


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Instruments

Dataset-specific Instrument Name
S4 Current Meter
Generic Instrument Name
Interocean S4 Current Meter
Dataset-specific Description
An S4 Current Meter (InterOcean Systems, Inc) was mounted on the MLML Particle Trap.
Generic Instrument Description
The InterOcean S4 current meter is a basic electromagnetic current meter with two pairs of internal electrodes and a flux-gate compass with an integral data logger. The S4 current meter is designed to directly measure with high precision the true magnitude and direction of current motion using two pairs of titanium electrodes located symmetrically on the equator of the sensor. An internal flux-gate compass provides heading information, used to reference current direction to magnetic North or, for fixed installations, the instrument may be operated in an X-Y orthogonal mode whereby the current vector can be referenced to a landform or structure. For more info, see www.interoceansystems.com/s4main.htm.


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Deployments

AII-119-5

Website
Platform
R/V Atlantis II
Start Date
1989-05-15
End Date
1989-06-06
Description
late bloom cruise; 31 locations; 61N 22W to 41N 17W

Methods & Sampling
PI: William Broenkow of: Moss Landing Marine Laboratory (MLML) dataset: S4 Current Meter Observations on MLML Particle Trap dates: May 18, 1989 to June 07, 1989 location: N: 59.8117 S: 46.24 W: -20.7483 E: -17.68 project/cruise: North Atlantic Bloom Experiment/Atlantis II 119, leg 5 ship: R/V Atlantis II


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Project Information

U.S. JGOFS North Atlantic Bloom Experiment (NABE)


Coverage: North Atlantic


One of the first major activities of JGOFS was a multinational pilot project, North Atlantic Bloom Experiment (NABE), carried out along longitude 20° West in 1989 through 1991. The United States participated in 1989 only, with the April deployment of two sediment trap arrays at 48° and 34° North. Three process-oriented cruises where conducted, April through July 1989, from R/V Atlantis II and R/V Endeavor focusing on sites at 46° and 59° North. Coordination of the NABE process-study cruises was supported by NSF-OCE award # 8814229. Ancillary sea surface mapping and AXBT profiling data were collected from NASA's P3 aircraft for a series of one day flights, April through June 1989.

A detailed description of NABE and the initial synthesis of the complete program data collection efforts appear in: Topical Studies in Oceanography, JGOFS: The North Atlantic Bloom Experiment (1993), Deep-Sea Research II, Volume 40 No. 1/2.

The U.S. JGOFS Data management office compiled a preliminary NABE data report of U.S. activities: Slagle, R. and G. Heimerdinger, 1991. U.S. Joint Global Ocean Flux Study, North Atlantic Bloom Experiment, Process Study Data Report P-1, April-July 1989. NODC/U.S. JGOFS Data Management Office, Woods Hole Oceanographic Institution, 315 pp. (out of print).



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Program Information

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)


Coverage: Global


The United States Joint Global Ocean Flux Study was a national component of international JGOFS and an integral part of global climate change research.

The U.S. launched the Joint Global Ocean Flux Study (JGOFS) in the late 1980s to study the ocean carbon cycle. An ambitious goal was set to understand the controls on the concentrations and fluxes of carbon and associated nutrients in the ocean. A new field of ocean biogeochemistry emerged with an emphasis on quality measurements of carbon system parameters and interdisciplinary field studies of the biological, chemical and physical process which control the ocean carbon cycle. As we studied ocean biogeochemistry, we learned that our simple views of carbon uptake and transport were severely limited, and a new "wave" of ocean science was born. U.S. JGOFS has been supported primarily by the U.S. National Science Foundation in collaboration with the National Oceanic and Atmospheric Administration, the National Aeronautics and Space Administration, the Department of Energy and the Office of Naval Research. U.S. JGOFS, ended in 2005 with the conclusion of the Synthesis and Modeling Project (SMP).



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Funding

Funding SourceAward
National Science Foundation (NSF)

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